cornwall



(No Model.)

J. B. CORNWALL. WOOD SPLIT'PULLEY.

No. 429,564. Patented June a, 1890.

PEI/warez.

AFN

m: NORRIS warns cm, Pun'rwm'um, msmmn'un, n. c.

after clearly explained and claimed.

' UNITED STATES PATENT OFFICE.

JOHN B. OORNWALL,'OF MOLINE, IIJLINOIS, ASSIGNORTO THE BARNARD (it LEAS MANUFACTURING COMPANY, OF SAME PLACE.

w'ooo SPLIT PULLEY.

SPECIFICATION forming part of Letters Patent No. 429,564, dated June 3, 1890.

Application filed September 17, 1889. Serial No; 324,190. (No model.)

T0 at whom itmay concern:

Be it known'that 1, JOHN B. CORNWALL, of Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Wood Split Pulleys; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to. the accompanying drawings, and to the letters of reference marked thereon,'which form part of this specification, in which Figure l is a face View of my improved sectional or split pulley. Fig. 2 is a sectional View thereof, showing the parts detached. Fig. 3 is a vertical sectional view of the same.

This invention is an improvement in sec} tional or split pulleys; and its objectsiare' to provide a pulley that can be made of very small diameter without having any spokes or hub, properly speaking, and which is sectional and can be fittedto various sizes of shafting, and which may be madeof metal entirely, or, which I deem preferable, a combination of wood rim or periphery and central metal frame, all of which will be herein- Referring by letter to the drawings, A B designate, respectively, the two sections of a metal frame, which, as shown, is triangular in cross-section, its corners, however, being cut off, so that really the frame might be called hexagonal. The part A comprises two sides of the triangular frame, being V-shaped, as shown, and part B comprises the-complementary part or third side of the frame. In the angle of part A is secured a block 0, of wood, preferably transversely of the grain thereof. Said block ispreferably secured in position by screws 0 passing through inwardly-projecting ears a of part A at the angle thereof, as shown. On the inner faces of the sides of part A and about centrally thereof are'cast offsets D D, which are boredand interiorly threaded for the engagement of bolts E E, that bind the part B to part A. Part B has its sides I) b bent upward, as shown, so that part B in cross-section contains one wide face and two narrow faces of the hexa- 011. a O O are blocks similar to blocks 0 and projecting inwardly from thesides I) b of part B, being secured thereto by screws passing through ears I) Z) at the ends of said sides, as shown.

E E are bolts passing through openings in part B, near the sides thereof, and through slots 0' on blocks 0', and engaging offsets D D of part A, as shown. The heads of these bolts being angular, they can be turned by a wrench, and thus part B securely bound to part A, as shown. The blocks 0 C C, it will be observed, all project inwardly and toward a common center and are at equal distances apart, and hence they can be readily clamped around a shaft W, as shown, and as part B of the frame is adjustable toward or from part Alto a certain degree it is obvious that the frame can be clamped accurately and firmly on a shaft, being properly centered by the blocks, and this adj ustability of the frame allows the pulley to be placed on shafts of slightly-varying diameters, and by shortening the length of blocks 0 O or cutting away their inner faces the pulley can be readily fitted to any shaft that will pass through the frame.

F F designate rim-sections secured to the sides of part A by means of screws F, as shown. Each section has its outer face dressed to form a thirdof the pulley-periphery, and F designates a triangular block inserted between the meeting ends of sections F F and the corner of part A, as indicated,

thus giving a solid appearance to the rim and section f, which fit between the outer faces of sides I) of part B and the ends of sections f F, as shown,.for the same purpose as block F The section f is secured to part B by means of screws G G, which pass through countersunk openings in section f, as indicated, and'engage threaded openings in part B.

In adjusting the pulley upon a shaft the blocks 0' O are first dressed or set to fit accurately upon the shaft, according to thediameter thereof. Then part A, with its rimseetions F F, is placed upon the shaft, and part B placed opposite thereto and clamped to part A by the bolts E E, the blocks C C centering the frame accurately upon the shaft. Section f is then secured to part B, and its ends are dressed to fit accurately against the ends of sections F F, and the section f having acertain amount of adjustability on part B the periphery of the pulley can be 1naintained perfectly true, notwithstanding the part B has to be adjusted slightly toward or from part A. The under side of section f is recessed to accommodate the heads of bolts E. The metal frame is centered and clamped upon the shaft with the sections F F before section f is placed in position; but as twothirds of the periphery of the pulley is comprised in sections F F the true centering of the pulley can be ascertained readily before placing section f in position. By simply removing section f the part B can be tightened if the pulley becomes loose on the shaft.

The form of the metallic frame might be varied without omitting the essential features thereof, which are having it in two parts united by bolts independently of the rim-sections.

These pulleys can be made any face or rim width desired without regard to diameter. The grip-blocks, being contained in the iron frame, are not affected by any shrinkage of the wood-work or by dampness. The clamping-bolts are contained in and bear only on the iron box and grain end of the hard-wood clamping-blocks, and are not liable to become loosened by shrinkage of the wood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent thereon, is-

1. In a split pulley, the combination of a triangular sectional frame, adapted to be clamped upon the shaft, with rim-sections secured directly to said frame, substantially as and for the purpose specified.

2. In a pulley, the combination of a metallic triangular two-part frame, united by bolts and adapted to be clamped upon a shaft, with the ri m-sections secured to said metallic frame independently of the clam ping-bolts thereof, substantially as described.

3. The combination,in a pulley, of a triangular metallic sectional frame and blocks secured therein, and the means for uniting the parts of said frame around a shaft, with the rim-sections upon said frame, substantially as specified.

4. A pulley made in two separable parts, having an inner metallic frame made in two parts, clamping-blocks in said frame, and means for clamping said blocks, whereby the pulley can be secured upon a shaft, substantially as described.

5. In a pulley having neither arms nor hub, asectional iron frame having a detachable and adjustable side piece, clamping-blocks secured within said frame, and the adjusting and clamping bolts, substantially as and for the purpose described.

6. In a wood" split pulley, an adjustable sectional triangular iron frame inclosed within the rim-sections, the clamping-bolts uniting the parts of said frame independently of the rimsections, and clamping-blocks in said frame for centering the pulley upon a shaft, substantially as described.

7. In a split pulley, the combination of a triangular metallic angular frame and bolts uniting the parts thereof,with rim-sections on and supported by theparts of said frame, substantially as described.

8. In a pulley having neither arms nor hub proper, an iron frame having one detachable and adjustable part and having bolts for attaching and adjusting said removable part to the remaining portion of the frame, in combination with three clamping-blocks secured in said frame, whereby said pulley can be clamped to a central shaft, substantially as and for the purpose specified.

9. In a wood split pulley, a triangular metallic frame or box having one removable and detachable part, clamping-blocks having the grain of the wood endwise to the shaft, and exterior wooden rim-sections secured upon the metal frame, substantially as described.

10. The combination, in a pulley, of a sectional triangular metallic frame composed of two parts united by bolts, substantially as described, and capable of being clamped and adjusted upon the shaft independently of the rim-sections, with the rim-sections rigidly united to the non-adjustable portion of said frame, and the rim-section removably and adjustably connected to the adjustable portion of said frame, substantially as described.

11. The herein-described pulley, consisting of a triangular metallic frame formed in two parts adj ustably connected by bolts, and the blocks secured at the corners of said frame and adapted to clamp the shaft when the parts of the frame are clamped together, with the fixed rim-sections on one part of said frame and the rim-section removably secured to the other part of said frame, all substantially as specified.

12. The combination, in a pulley, of the angular metallic frame composed of a part A, having interior offsets perforated and screwthreaded, and the part B, united to part A by bolts engaging said offsets, the rim-sections F F, secured to part A, and the rim-section f, secured to part B, and the angular blocks between the ends of the adjoining rim-sections, all substantially as and for the purpose described.

13. In a pulley, the combination of the triangular frame composed of the parts A and B, part A having internal perforated and screw-threaded oifsets and a clamping-block G, and part B having angular sides and clamping-blocks O O thereon, and the blocks D D, uniting said parts, with the rim-sections F F, rigidlysecured to part A, and the rimsection f, removably secured to part B, and.

the angular pieces interposed between the ends of adjoining rim-sections and the corners of the frame, all substantially as and'for the purpose described. 

